Improvement in nut-locks



STATES PAT 'r IMPROVEMENT IN NUT-LOCKS.

Speciication forming part of Letters Patent No. 183,472, dated October17, 1876; application filed August 26, 1876.

To all whom it may concern:

Be it known that I, ANDREW J. SCOTT, of Martins Ferry, Belmont county,Ohio, have invented a new and useful, Improvement in Lock-Nuts, of whichthe following is a specification, reference being had to theaccompanying drawing. y

My invention relates to a device for preventing threaded nuts or burrsfrom working'off the bolts by the jar caused by moving machinery; andconsists of a circular dish-shaped plate of thin steel, having anopening in its center, of suitable diameter, which is placed over thebolt and against the nut, with its bulged or rounding side out, and bystriking f the plate a blow with the hammer or other tool the plateassumes a line at right angles t approximately with the bolt, therebyforcing the edge of the' plate at the center opening into the threads of.the bolt, and effectively locking the nut from turning off.

To enable those `skilled in the art to make and use my invention, I willproceed to describe its construction andmanner of application, referencebeing had to the drawing, in' which- A, Figure l, illustrates my device,which, for convenience, I will call a locking-washer, closed in on athreaded bolt, B, up close against a nut, D. Fig. 2 is a centralsection, showing the edge of the locking-washer A closed in between thethreads of the bolt B. Fig. 3 is a top-plan view andv central crosssection of the locking washer A. Fig. 4 is a side view of thelocking-washer A and nut D.'

I propose to make my device of common thin steel, orl what is known asblister-steel.7

In using my device, the n'ut is first placed in position, andthelocking-washer thenplaced on the bolt against the nut 5 then, bystriking the washer a quick blow with a hammer or other tool, the inneredge is driven toward a line at right angles with the bolt, and forcedin between the threads, where it remains, securely locking the nut untilit is desired to remove it, which can readily be done lby cutting. Anytendency of the nut to turn off causes the locking-washer to bindtighter to the bolt.

Having described my invention, what I claim, and desire to secure byLetters Patent,

The bolt B and nut D, in combination with the circular dish-shapedwasher A, said washer entirely overlapping the nut, and having an indenton its inner edge forced between the threads ot' the bolt, locking thenut, substantially as described.

ANDREW J. SCOTT. Witnesses:

GY. BATES HOWARD, I. B. FORD.

